It is made of the non-wood material ABACA (Manila hemp) and wood-pulp based on a forestation project. The ABACA filter paper can be said an eco-friendly filter paper. It has good air and liquid permeability, toughness, and elasticity. Of course, it is made in Japan. Specialty coffee paper filters: CAFEC Abaca trapezoid paper filter for 1-2 cups 100pcs/pack Disposal of paper filters made by the manufacturer for over 47 years Papermaking process: Dewatering: Dewater pulp and make a paper sheet. Drying: Dry the paper sheet by heating. Rolling: Roll the paper sheet under finely tuned and adjusted rolling pressure. These Trapezoid filters were designed for use with the Cafec Trapezoid Dripper, the Cafec Abaca Trapezoid Paper Filter is also compatible with other trapezoidal drippers like Kalita HA Dripper, Clever Dripper S (300ml) 1-2 cups/3-5 cups.